[题目]公元前28年.史籍曾记载:“三月乙未.日出黄.有黑气大如钱.居日中央. 据此回答下列各题.[1]这种现象发生在太阳的( ) A．光球层 B．色球层C．日冕层 D．太阳内部[2]再次观察到此种现象的时间大约是( )A．公元前39年 B．公元前17年C．公元48年 D．公元17年题目和参考答案——青夏教育精英家教网—

题目内容

【题目】公元前28年，史籍曾记载：“三月乙未，日出黄，有黑气大如钱，居日中央。”据此回答下列各题。

【1】这种现象发生在太阳的( )

A．光球层 B．色球层

C．日冕层 D．太阳内部

【2】再次观察到此种现象的时间大约是( )

A．公元前39年 B．公元前17年

C．公元48年 D．公元17年

【答案】

【1】A

【2】B

【解析】

试题分析：

【1】资料中记载的“黑气”是太阳黑子，它比太阳表面温度低，在太阳表面形成暗斑，看起来象是太阳变黑了一块，太阳黑子主要发生在太阳的光球层。色球层发生的是耀斑，是太阳增亮的现象；日冕层发生的是太阳风。

【2】太阳黑子出现的平均周期约为11年，因此再次观察到此种现象的时间大约是公元前17年，所以B正确。

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